Apparatus for governing and operating valves.



'D'ARCY A. WILLSHAW.

APPARATUS FOR GOVERNING AND OPERATING VALVES.

APPLIOATIOH FILED MAR. 29, 1912.

DAZBJIY smswomnwrmis ew, or eemvous'rrn, SCOTLAND.-

srrarg'e rvs Fol; GOVERNING AND ornne'rme VALVES.

To ell 201mm it'may m 1 Be It known hat. I DA'nor Ainsnioa'rr-t W N 7n4. w, a'sub ect 0L the lung of tzreat Britai rand lrelandpresiding at"iayniouth Engineeriii Works, Garnousti'e, in the county Of-" .Qra. r,Scotland, have invented new and usefulImprovements in 'i-Xpparatus. forGoverning Operating Valves of which" the followingis 1a; specification.

This irivention'relates to a type of apparatus for governing andoperating admission valvcsin suehh manner that the opening of a valve'wil l heinversely in propor- (ion to the speed of the engine of whichthe valve isa part.

Theinvention is applicable to the gas and air admission valves of aninternal combus tlonen ine'or to any other valve of that type w ere itis desired to regulate the 'o'lume of fluid admitted to the cylinder.

In gas'en iines'zt-he rate of rotation of the crank slia-ft" determinedby the quantity of explosive nurture admitted to the cyliuderiu a statedperiod,b y th erichhess of. the luixturc'and' by the amount, ofcompression of suc hnurture hefoiie ignition. 'lhe quan tity of mizitureadmitted is determined either by the hit; and rniss method, or by var inthe amount re" uired for each ex- 39 plosion.

i apparatus; is applicable to the two methods "of. liegl'llating thesupply of explosive mixture .fOlll'littIlZl'l combustion engil es, thatis to say the quantity of explosive mixture can be varied tor eachexplosion, or the supply-Can entirely cut off for one or morereeiproeations of the piston.

In order that my invention and the rnai rnerflof utting the same intopractice you bc .propel'ly llllgel'StQ Od I have hereunto appended aiiexplanatory sheet of drawing, in which the same reference n'u' merals'are used to "indicate corresponding p te i j 'th' figur s ow vFigure-.1 is zi'part sectional elevationshowins th en a a r ngeme o tpperatus as applied toa gas engine. igl 2 is detail view of theearnroller lever'and Fi a view loo.l ing in the direction of the arrowAfFig. 2. i i In carrying out my invention I use a r0- tatory ballgovernor 1 which can cause a lever 2 to rise or fall, this lever being'pivot ed at 21 to .the frame. Suspended at the free end of this leveris a rod 3 and on its lower end is adjustably fixed a setter blockSpecification of Letters Patent. Application filed Marc'n 29, 1912Serial No. 686,984.

adjusting the jam nuts against the pressure of ,a spring.

trolled and operated ,by the governor 1, role rat-came July 1, 191s,

1 which can he madeto move up rdown o v a vertical guide 5 withinvcertain limits On arotatoryg shaft. (3 operated from the engine crankshaft so. is a single hit cam T'in touch with cai'n roller S on a fingerlever 9 pivoted ton engine at 10. At the free end ofthis leve Y o is anadjustable spring plunger 11' whose adjustment can be effected by meansoftlie nuts 12 and lil. In practice I find ihadvis able to use a secondspring plunger 14 si'rni I lar in design to that first mentioned for.the mason that if only one. plunger heused I the spring 15 has to he sostiff thatit' may fracture whereas it two spring plun er s he i used thesprings will be subjected to ess ini dividual. stress. Inffrontof thelever 9 -isa similar lever 16 pivoted to the eng-ine'at 23' its free endhaving on it a push knob .17 '75 which can he made to come against-thestem of the valve 18 and thus open 'thevalv e- 0n the faceof this lever10 and" opposite the li of (he presser block 4 is air-inclined? he. 19,This plane may be iuclin'esl opposite the \\'l\0lt. path of the presseriblockas is.- shown in the drawings, "or for a part it upper end itmay-he parallel to the .presser f guide 5 as-sh'ewn by the dotted lineslig-a 8 5 The apparatus operates asfol-ldwsffl'lhe cam 7 when rotatingmovesforward the finger lever 9 next. it which ,znovernent istransmitted throughthe spring plungers ll and 1 1- to the finger lever1.6 in front, 99 this lever in turn moving iorward and lift-1 ing theadrnission valve 18 ofi' -its seat. The amount of valve lift is.cletermined position of the setter bloek-, which is con-19'5 tive tothe inclined plane 19 on the lever 16 the excess notion ifianyofthe-back 1c ver 9 heingtaken up bythe'springplungers. The springsoperating the plungers ere-inore than strong enough'to open the valveNhen the settler block isjat its lower position as shownhy the fulllines 1 and 2 the engine is running below its *fne r malspeedftheinclined plane of the froht lever does not come in contact withthebloek 1 5' 4 and the two levers 9 and 16 can vibrate v to the fullextent, this fully openings the valve 18 and when the setter block-is atthe highest position it is in Contact with the inclined or the parallelportion of the pl of the front lever as shown by the dotted lines inFigs. 1 and 2 and. the push knob 17 cannot operate the-valve, the backleyer 9 at that time moving as before, the spring 1 plungers also movingout and in due to the want of movement of the front lever. intermediatepositions of the setter block the engine load and from 50% downward.

tono load the hit and misssystem. Thiscombination is accomplished by theleverv 16 having a parallel face for a shortdistance down the inclinedplane.

The action is as follows: At half load the setter block t is about theposition Z. Im-

'mediately the setter block passes up beyond the point Z it isimpossible for the lever 16 to move forward, thus shutting olf the fromthe engine. As the speed of the engine decreases the setter block fallsbelow Z which allows the lever l6 to move sufiiciently forward as toopen the valve18 wide enough to admit gas equal to approximately halfengine power. 1

'Having now described my 'i.r'\vention, \-vhat- I claim as new anddesire to ecure by Letters Patent is 1. In' apparatus for governing andoperatively engaging the valve, a second vibratory lever at the back ofthe firstmentioned vibratory lever and provided with two spring pushknobs and a cam roller, said knobs engaging said first mentionedvibratory lover, a rotatory cam actuated bythe engine shaft foroperating the second lever and through it the first lever and the valve,and a rod adapted to be moved by Said pivoted lever, block adapted toco-aet 'iit said first vibratopy. levcrito limitatsani n A 2. Inapparatus for governing and crating valves a vibrato'rylever v d d withan in'clincd face andi a; knob adapted to conLrol the valve in'combir'latio fi with a second vibratory lever @lseedbthiial it, saidsecond lever having two sprin 1 sh knobs engaging said first'leverf'a'nd a am roller, and engine actuatedineans'adapted to' engagesaid cam rollertoflact uate said secondflever -asjdescribed.

In testimony whereofl have signed name to this specification intliepicsen

